Abstract
A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).
| Original language | English |
|---|---|
| Pages (from-to) | 151-156 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering B: Solid-State Materials for Advanced Technology |
| Volume | 177 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2012 Feb 15 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes. / Yoon, Jong Seol; Yoon, Mi Young; Kwak, Chan; Park, Hee Jung; Lee, Sang Mok; Lee, Kyu Hyoung; Hwang, Hae Jin.
In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 177, No. 2, 15.02.2012, p. 151-156.Research output: Contribution to journal › Article
TY - JOUR
T1 - Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes
AU - Yoon, Jong Seol
AU - Yoon, Mi Young
AU - Kwak, Chan
AU - Park, Hee Jung
AU - Lee, Sang Mok
AU - Lee, Kyu Hyoung
AU - Hwang, Hae Jin
PY - 2012/2/15
Y1 - 2012/2/15
N2 - A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).
AB - A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).
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UR - http://www.scopus.com/inward/citedby.url?scp=84855803123&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2011.10.016
DO - 10.1016/j.mseb.2011.10.016
M3 - Article
VL - 177
SP - 151
EP - 156
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
SN - 0921-5107
IS - 2
ER -